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[TowerTalk] 43 ft vertical - feeding and balun

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Subject: [TowerTalk] 43 ft vertical - feeding and balun
From: "Craig D. Smith" <>
Date: Sun, 23 Nov 2008 15:56:47 -0700
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I agree that a high quality general purpose remote auto-tuner suitable for
KW+ levels over a "DC to Daylight" frequency range and undefined extreme
impedance loads would turn out to be a quite pricy product!   But perhaps
with the widespread acceptance and usage of the 43 ft vertical, a case could
be made for a special purpose tuner product to service (and expand) that
market.  I'm thinking in terms of a set of L networks to get you in the
right vicinity for each band.  Most people wouldn't use this vertical for 15
and above due to the higher radiation angle.  So all you would need would be
perhaps one network each for 80, 75, 40, 30 and 20 - a total of 5.  60
should be OK w/o a network.  The philosophy would be to just use these
networks to get you into a coax-friendly environment (SWR < 3 to 1 or so)
and then use the tuner at the rig for the final tweaking if required.  The
networks could be directly switched via band decoder, etc. with no need for
any feedback on the tuning process.  This should drastically reduce the
complexity and cost of such a product when compared to a general purpose
tuner.  I'd buy one!

    ... Craig   AC0DS


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